N-(Trifluoroacetyl)daunorubicin is an impurity of Epirubicin, which is an anthracycline topoisomerase inhibitor used as an antineoplastic agent.

2-fluoro-5-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoic acid is an impurity of olaparib, which selectively binds and inhibits PARP, inhibiting PARP-mediated repair of single-strand DNA breaks.

A reagent used in the syntheisis of benzidine and diaminofluorene prolinamide derivatives which are highly potent HCV inhibitors.

Atazanavir is a heavily substituted carbohydrazide that is an antiretroviral drug of the protease inhibitor (PI) class used to treat infection of human immunodeficiency virus (HIV). It has a role as an antiviral drug and a HIV protease inhibitor.